What is the reason for the failure light of Nissan Sylphy engine?

What is the reason for the engine fault light of Nissan Sylphy? What is the reason for the engine fault light of Nissan Sylphy? The reasons for the engine fault light are: poor combustion of mixed gas, sensor problems, maintenance problems and oil quality problems. The reasons for the failure light of Sylphy engine are: 1, and the exhaust emission is not up to standard, such as poor fuel, failure of three-way catalyst, excessive carbon deposition in intake pipe, blocked fuel nozzle, oxygen sensor failure, and occasional engine misfire. The engine fault light will turn on, and the engine fault light will turn on the most because of poor oil quality; 2. The fault light is on due to poor engine system, such as the fault of accelerator pedal sensor, throttle position sensor, air flow meter and crankshaft position sensor. Or poor line contact, etc. , it will cause the engine fault light to light up; 3. Some vehicle gearbox system failures are also indicated by engine failure lights, such as internal gearbox failures, slippage, high temperature, etc. @20 19